What is composition as it relates to object oriented design?

Question

I hear (and read on this site) a lot about \"favour composition over inheritance\".

But what is Compositon? I understand inheritance from the point of Person : Mamma

Answer 1

Composition is simply the parts that make up the whole. A car has wheels, an engine, and seats. Inheritance is a "is a " relationship. Composition is a "has a" relationship.